Heathrow Airwatch uses cookies to make the site simpler. Find out more about this
Latest air quality summary
Number of monitoring sites in each pollution band
Heathrow Airwatch was last updated at 15:00 on Saturday 27th July 2024
- Low20
- Moderate0
- High0
- Very High0
- No Data2
- 22
Total monitoring sites
Low (1-3)
Moderate (4-6)
High (7-9)
Very High (10)
Offline | Find out more about the air pollution index and bandings
Offline | Find out more about the air pollution index and bandings
Hounslow Feltham
Parameter | Pollution Band | Concentration | Period |
---|---|---|---|
PM10 Particulate matter (PM10) Updated: 27/07/2024 14:00 |
Low (Index 2) | 17 µg/m3 (INDIC GRAV) | 24 Hour mean |
Oxides of Nitrogen (NOXasNO2) Updated: 27/07/2024 14:00 |
not applicable | 6 µg/m3 | hourly mean |
Nitrogen dioxide (NO2) Updated: 27/07/2024 14:00 |
Low (Index 1) | 2 µg/m3 | hourly mean |
Nitric Oxide (NO) Updated: 27/07/2024 14:00 |
not applicable | 3 µg/m3 | hourly mean |
Note: These results are based on provisional data. The data are presented in graphical form based on the highest pollutant measured at each site.